1830779 - Enable @import supports conditions by default

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, task)

Description

[Oliver Medhurst [:canadahonk]]

Turn on supports conditions in CSS imports (@import supports(...)) by default.

Spec: https://www.w3.org/TR/css-cascade-4/#conditional-import

Intent needed.

MDN changes:

• No compat data exists for the feature itself (https://developer.mozilla.org/en-US/docs/Web/CSS/@import#browser_compatibility)
• The new CSSImportRule attribute (supportsText) has no docs (https://developer.mozilla.org/en-US/docs/Web/API/CSSImportRule)

Comment 1

[Oliver Medhurst [:canadahonk]]

Attachment: Bug 1830779 - Enable @import supports conditions by default

Enabled supports conditions in CSS imports (@import supports(...)) by default.

Comment 2

[Oliver Medhurst [:canadahonk]]

Intent to ship: https://groups.google.com/a/mozilla.org/g/dev-platform/c/ee9M0DJrNDQ

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/08207806be4c
Enable @import supports conditions by default r=emilio

Comment 4

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/08207806be4c

Comment 5

[Oliver Medhurst [:canadahonk]]

Release Note Request (optional, but appreciated)
[Why is this notable]: New CSS feature shipped on by default (in 115)
[Affects Firefox for Android]: Yes
[Suggested wording]: Not sure. For reference, no other browsers implement or ship this at all (yet).
[Links (documentation, blog post, etc)]: No good docs/posts yet?

Comment 6

[Donal Meehan [:dmeehan]]

:canadahonk thanks for the release note nomination, could you provide some suggested wording as a starting point?
Maybe the code reviewer can help you?

Comment 7

[Oliver Medhurst [:canadahonk]]

Could have something like "Supports conditions are now supported in (CSS) import rules (@import supports(...))"?

Comment 8

[Dave Letorey]

Related Pull Requests

Experimental Release PR 27349
BCD PR 20132
Content PR 27075

Wrongly added this to the wrong issue

Comment 9

[Dave Letorey]

Related (correct) Pull Requests

• BCD
• Content
• Firefox Release